Process for producing powder of cationic polymer
AssigneesMitsubishi Rayon Co., Ltd., Nitto Chemical Indutry Co., Ltd., Diafloc Co., Ltd.
InventorsTeruhiko Sugimori, Hideaki Habara, Ken-ichi Inukai, Akihisa Furuno
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Abstract
The invention relates to a process for producing a powder of a cationic polymer by spreading on a moveable carrier a layer of an aqueous solution of a vinyl monomer, carrying out continuous polymerization followed by peeling off hydrous polymer from the carrier in a hot state, and cutting said hydrous polymer in a hot state by a shearing stress.
Claims9
A process for producing powder of a cationic polymer by spreading in a layer on a movable carrier an aqueous solution containing a vinyl monomer comprising mainly at least one monomer selected from the group consisting of a compound represented by Formula (I):
- ##STR3## a salt thereof and a derivative thereof quaternized with an alkylating agent in an amount of 75 to 90% by weight, and carrying out continuous polymerization, which comprises:
- (a) carrying out polymerization of said aqueous solution, with being made a layer with a thickness of 40 mm or less, and after substantial completion of polymerization, peeling off the resulting hydrous polymer from the carrier under such a hot state that the central portion of the hydrous polymer is at a temperature not lower than the Vicat softening point of said hydrous polymer, and
- (b) cutting said polymer under the hot state that the central portion of the hydrous polymer is at a temperature not lower than the Vicat softening point of said hydrous polymer by a shearing stress into rods or dice, followed further by crushing, if necessary, into sizes of 20 mm or less.
Dependencies are inferred from the claim text.